Toady1
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| posted on 31/8/06 at 06:36 PM |
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webers or delortos?
ive had weber dcoe carbs before, what the differnce between them and the delorto's? are they as good as webers?
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whitestu
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| posted on 31/8/06 at 06:38 PM |
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Comparing Webber and Dellorto downdrafts on Aflasud engines the Dellortos allways seemed better. Don't know about DCOEs though.
Stu
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DIY Si
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| posted on 31/8/06 at 06:47 PM |
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From what I've seen, there's not much in it. Webber's often give a little extra top end, but are heavier on fuel. Oh, and
dell'ortos are often cheaper.
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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Toady1
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| posted on 31/8/06 at 06:49 PM |
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i take it they sound the same tho?
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givemethebighammer
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| posted on 31/8/06 at 07:00 PM |
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Have you considered motorbike carbs ?
Cheaper
Stay in tune better
Still sound great
(Honda Blackbird carbs on my Zetec)
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02GF74
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| posted on 31/8/06 at 08:04 PM |
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from book by Des Hammill:
both are as good; down to personal preference.
D have slightly improved some features of the W, wcih came first.
D have better chke feature.
D accelertor pump is not as compact as W.
I'm pretty sure that D have more chokes/needles to choose from so tuning in finer increments.
Relly depends on which you can find in good cond. and are cheaper.
both fit on same manifold and will use same air filter.
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tobymack
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| posted on 1/9/06 at 04:15 AM |
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quote:
Have you considered motorbike carbs ?
Cheaper
Stay in tune better
Still sound great
Really?
Dellortos plus a manfold can be had for less than £100 on ebay (£85 in my case). Are bike carbs with manifold less than that?
In my experience dellortos do not go out of tune- the only time I have had to retune is when I have changed something.
On the other hand, dellortos are probably much heavier than bike carbs and are not as trendy.....
Toby
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DIY Si
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| posted on 1/9/06 at 01:57 PM |
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The bike carbs themselves could be had for less than £100, but not a manifold too. I've never meant wh=at people mean when they say carbs go off
tune. Unless something has come loose, nothing can change. They can get grubby, but can't go off tune. The engine may wear and as such the
fueling may now be ff, but the carbs won't differ.
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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lotustwincam
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| posted on 1/9/06 at 10:25 PM |
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quote:
Originally posted by Toady1
ive had weber dcoe carbs before, what the differnce between them and the delorto's? are they as good as webers?
Having fitted a pair of Dellorto's earlier this year, I know a bit more about them now than a year ago. You may find the following helpful.
One of the physical differences you have to be aware of is that Dellorto's are considerably taller due to the tower at the top. Not normally an
issue on a tin top, but might be on a Seven if space under the bonnet is a bit neat.
Dellortos also have a peculiar pump jet mechanism that has a rod protruding underneath. This will cause problems on Xflow engines as it will foul the
distributor.
Most of the Dellortos on eBay are OEM equipment off the likes of Alpha's. These will have a suffix letter e.g. DHLA 40H. These versions with the
suffix (F onwards I believe) are commonly referred to as emission models. They usually have 5 progression holes and are not as tunable as the earlier
non-emission models (no suffix- 3 progression holes).
The emission models will generally work better on the larger engines (1600cc and over) with mild cams.
Most of the information that you read about jetting (Dave Andrews site and Des Hamill book) refer to the non-emission models and won't get you
very far with these later models.
Overhaul kits, main and idle jets are quite reasonably priced, but pump jets and emulsion tubes are expensive. For this reason if buying from eBay try
to find carbs that have been jetted for your engine spec, and always ensure that the seller confirms that all jets are in place. (The 1st set I bought
of eBay had most of the jets stripped out!!)
Throttle spindle wear apparently is something that affects Webers more than Dellortos as does problems with the starting/enrichment device, which
incidently I find works great and can't understand why lots of people don't bother connecting.
And yes, they do sound great.:
The above information is correct to the best of my knowledge and belief. E &OE
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gazza285
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| posted on 1/9/06 at 10:49 PM |
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Bearing in mind that a bike carb manifold is just a bit of plate with four tubes welded to it, making your own is a diy proposition. Best to get the
mounting face surface ground once you have done though.
I've got one engine running on 45 Webers, and fully intend to build another (I've got the bits already) running with GSX1000 carbs as a
drop in spare. Both engines are heavily modified Crossflows.
DO NOT PUT ON KNOB OR BOLLOCKS!
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Toady1
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| posted on 2/9/06 at 06:23 PM |
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cheers for the help guys!
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